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A085532 (2n)^(n+1). 0
0, 4, 64, 1296, 32768, 1000000, 35831808, 1475789056, 68719476736, 3570467226624, 204800000000000, 12855002631049216, 876488338465357824, 64509974703297150976, 5097655355238390956032, 430467210000000000000000, 38685626227668133590597632 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

MAPLE

a:=n->mul(2*sum(1, j=2..n+1), k=1..n+1): seq(a(n), n=0..17); # Zerinvary Lajos, Jan 01 2009

MATHEMATICA

Table[(2n)^(n+1), {n, 0, 20}] (* Harvey P. Dale, May 03 2011 *)

CROSSREFS

Sequence in context: A014729 A322519 A259272 * A146341 A264335 A091483

Adjacent sequences:  A085529 A085530 A085531 * A085533 A085534 A085535

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jul 05 2003

STATUS

approved

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Last modified March 23 05:36 EDT 2019. Contains 321422 sequences. (Running on oeis4.)